I have a high dpi book scan which is very slow to read, probably owing to the fact that it has all gradation and colourful goodness of the pages and text. I want to get rid of everything extra and basically, make it into a 1 bit black & white format, in hopes of making it faster. I see a lot of old free books online that have this format, and they run fast enough.
How can I do it, preferably with just Adobe Acrobat Pro and nothing else?